Cupola.



G. A. ROSS.

CUPOLA.

APPLICATION FILED JAN. 2|. I916.

1 ,272,854;. Patented July 16, 1918 2 SHEETS-SHEET 1 G. A. ROSS.

CUPOLA.

APPLICATION FILED 1AN.21. 191s.

Patented July 16, 1918.

2 SHEETSSHEET 2.

GEoRGn A. Ross, of oHIoAeo, ILLiNois.

cUroLn.

Specification of Letters Patent.

seemed as 16, 1918.

A pncatioh filed. 'Jantny 21, 1915. serial No. 73,323.

To all whom a: may concern: 7

.Beit knownthat I, GEORGE A. Ross,a citizen of the United States, and aresident of- Chicago, county of Cook, and State of Illinois, haveinvented certain new and usefullinprovements in Cupolas, of which thefollowingis a specification. Y,

My invention relates generally to improvements in cupolas, and hasparticular reference to improvements in c-upolas for instructionpurposes. I H

The demand for instruction in vocational subjects has led to theestablishment of many technical and manual training schools of bothpublic and private characterwhere subjects of this kind are taught. Manyof these schools are public schools or schools so conducted that pupilsenter directly from the grammar school in large numbers and are taughtsuch subjects as pattern making, machine shop practice, foundrypractice, etc. It is highly important that the equipment for this.purpose shall be simple, and durable, to the end that it may besuccessfully operated by the student of average ability, and of suchnature that a great number of students may be taught with a limitedequipment. p Y I The general object of my invention is to provide acupola, which be better adapted for use in schools, than those hithertodevised.

A furtherobj'ect of my invention is to provide a cupola which shallfacilitate the work of repairing the lining; and other objects are toprovide a cupola, by means of which it shall be possible to show theinterior of the working part to a large class of students at the sametime, and to demonstrate the general construction of the furnace, thecon struction and arrangement of the lining, the location of the meltingzone, the action of heat and fluxes on the lining, and a method ofchipping and daubing the furnace.

Another object of my invention is to provide a cupola for school usewhich, while especially designed to facilitate instruct-ion, shall alsobe eflicient and economical and capable of producing commerciallyacceptable iron.

My invention consists generally in the form, arrangement, andconstruction of parts, whereby the above named objects, to gether withothers which will appear hereinafter, are attainable.

My invention will be more readily under stood by reference to theaccompanying drawings illustrating the preferred embodiment of myinvention; and in which Flgure 1 is a perspective view of the cupola incondition for use.

Fig. 2 is a perspective View similar toFig. 1 but showing the cupola incondition for easy inspection or repair.

F1g. 3 is a view of the cupola, partly in elevation and partly insection, better to disclose the airsupply system. Y

-Fig. 4 is a cross sectional view substantially on the line 4-4 of Fig.3.

Fig. 5 is a face view of one of the air nozzles.

F 6 is an enlarged detail sectional view substantially on the line 6 6ofFig. 3'; and

Fig. 7 is a cross sectional view of the upper or stack portion of thecupola.

I Thecupola frame consists of four-vertieal columns, which'rest in andare fastened to cast iron bases 3, and tothe upper end of which aplatform frame a, composed of channel iron, is secured. My novel cupolain this instance comprises three parts, t0- witz a lower part5, anintermediate part 6, andanupper part 7. I shall hereinafter refer tothese parts respectively as, the tilting section, the charging door;section, and the stack section, I support the charging door section 6from the platform frame a by means of a plate or annulus l0, which restsupon-the channeliron and extends inwardlyas is best shown in 3 and 6,The shell 11, and lining 12, of the charging door section both rest uponthe member 10 while the depending portion 13 is carried by ears 1 1depending from the member 10 and fastened to the furnace shell. Thetilting section is supported upon steel bars 15 which span the columnsand are secured thereto by means of trunnions 16. The trunnions 16 areof special design, having a large central opening for the admittance ofthe air inlets 17 which communicate with the boxes 18 secured to theshell of the tilting section. I locate the trunnions in such positionthat the section carried thereby is well balanced to enable easyswinging movement thereof.

In order that the air may be spread throughout the entire crosssectional area of the furnace, I provide nozzles 19, of novelconstruction, for conducting air from the boxes 18 into the furnace.These nozzles, as is best shown in Figs. 4 and 5, have a relativelylarge cylindrical opening at the air box'end and taper to a relativelylong narrow mouth 20 at the furnace interior. By this nozzleconstruction I am able to spread the air throughout the entire crosssectional area of the furnace, as is indicated by the arrows in Fig. i,and thus to produce a cross'sectionally even combustion of fuel anduniform melting of the iron. The importance of uniform presentation ofair to the fuel cannot be overestimated.

In order that the actual operation of the furnace may be observed by thestudents, I provide a sight opening 21 adjacent the lower end of thefurnace. This sight opening greatly assists the students inunderstanding the conditions and phenomena of cupola practice.

In the upper end of'the lower 01' tilting section and in the lower endof the intermediate section, I provide complementary sloping or anglingfaces 22 and 22 respec tively, so that a tight joint may be formed whenthe parts are positioned for melting. The lining 12 of the section 6 issupported independently by means of the inwardly extending flange 24which. is supported on the platform t, as is best shown in Fig; 6. Whereit is necessary or desirable to use an additional straight or elbowstack, I support it by means ofa ring 25 which is secured to thecharging door section and which has an inwardly extending flange 26which su ports the elbow shell as well as the lining 2 Thus the liningof the elbow, and in fact the lining of all parts of thefurnace, issupported independently of the lining of the other parts and can,therefore, be repaired without in any way interfering or affecting thelining of such other parts; This is a great practical convenience and isof especial service where the cupola is to be lined and chipped bystudents of average ability.

By tilting the lower section of the furnace it is possible easily andconveniently to repair the lining and to lecture to a large number ofstudents upon the interior or Genius of tlill patent may be obtained forping out and daubing the furnace. I On the other hand, when the furnaceis in melting position, 1t is to all mtents and purposes as effectlve asa furnace of the standard commercial type, that is to say, all theconditions and phenomena met in commercial cu,- pola practice, areaccurately reproduced but on a scale suited to the -needs of a schoolfoundry.

It is thought that the foregoing detailed description will enable thoseskilled in the art tolwhich this appertains to make and to use the same.Inasmuch, however, as various modifications will readily suggestthemselves to those skilled in the art, I do not wish to be limitedtothe precise structure shown and described, except as may be necessary bylimitations in the hereunto appended claim.

I claim:

In a cupola of the character described, th combination of a tiltingsection, an intermediate section and a stack section arranged insuperimposed vertical alinement, said intermediate and tilting sectionshaving sloping contiguous faces whereby said tilting section can beswung to and from said intermediate section without elevating theintermediate section, means for separately and independently supportingbrick lining in each scction, trunnions on which the tilting section iscarried, and air conduits entering the tilting section through saidtrunnions. I

In testimony whereof, I have hereunto set my hand, this 28th day ofDecember, 1915, in the presence of two subscribing witnesses.

GEORGE A, RUSS.

Witnesses} ARTHUR WM. NELSON, JOHN R. Lnrnvnn.

five cents each, by addressing the Commissioner oi' la teuts,Washington, I). G.

